Experimental study on real bridge before and after simple-supporting to continuous reinforced concrete hollow slab

Authors

  • Bowen Hu 18503607308
  • Jianxi Yang
  • Quansheng Sun
  • Chao Zhang

DOI:

https://doi.org/10.14311/CEJ.2023.02.0015

Keywords:

Concrete hollow slab, Simply supported-continuous, Old bridge strengthening, Finite element analysis, Static load test

Abstract

This article studies a concrete hollow slab simply supported-continuous actual engineering project in a certain city. Before the reinforcement of the bridge, there were cracks and exposed rebars, etc. In order to ensure the safe operation of the bridge, a reinforcement method of simply supported-continuous was adopted, prestressed steel strands are used to convert the simple-supported structure into a continuous structure, thereby improving the structural load-bearing capacity and overall integrity. Through conducting comparative analysis of load tests on a bridge before and after reinforcement, this article studies the improvement effect of the simply-supported-to-continuous reinforcement method on the bearing capacity of the bridge. A finite element model of the bridge was established, and comparative analysis was carried out before and after the reinforcement of the bridge. The bearing capacity and work performance of the bridge structure were evaluated. The research shows that the simply supported-continuous reinforcement method has a good improvement effect on the load-bearing capacity of the concrete hollow slab and can be used to improve the insufficient load-bearing capacity of the concrete hollow slab bridge in the city.

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References

Lu Fei, Peng Cheng. Analysis, comparison and application of common bridge reinforcement methods [ J ]. Highway, 2013, ( 10 ) : 121-123.

Zheng Zhaodong.Research on post-evaluation of bridge reinforcement [ J ].Technical information, 2013, ( 15 ) : 378-378.

Wang Shichao, Wang Chunsheng, Wang Qian, Tian Xiaofeng & Duan Lan. ( 2018 ). Flexural behavior of full-scale prestressed concrete hollow slab beams strengthened with composite reinforcement. Journal of Transportation Engineering ( 02 ), 31-41.doi : 10.19818 / j.cnki.1671-1637.2018.02.004.

Zhan Runshui, Hu Zhaofang, Shuai Changbin. Reinforcement technology and examples of old highway bridges[M]. Beijing:People's Communications Press,2002.

Yuan Quan, Zhang Song. Reinforcement design of a concrete cable-stayed bridge[J]. East China Highway,2003,(5):3-5.

Shen Yuqiang. Mechanical analysis of continuous bridge system conversion after simple support[D].Chongqing:Chongqing Jiaotong University,2009.)

Zhu Hanbing,Yang Yaxun & Fan Weiya.(2015).External Prestressing Bridge Reinforcement Technology Review. MATEC Web of Conferences.

Zhao Guodong,Duan Shixin,Sun Bo & Yuan Xiaohua.(2021).Application on large-span reconstructed structure with external prestressing technology. Journal of Physics: Conference Series(4). doi:10.1088/1742-6596/1885/4/042042.

Xin Lijuan, He Huanan, Chen Xu. Internal force analysis of the old bridge before and after continuous reinforcement [ J ]. Low temperature building technology, 2013, 35 ( 8 ) : 67-69..

JTG 3362-2018 Specifications for design of highway reinforced concrete and prestressed concrete bridges and culverts [S]. P.R. China, Ministry of Communications, 2018.

Sun Quansheng & Liang Daoyu. (2019). Analysis of the design effect of external prestressed reinforcement of urban low box girder. Low Temperature Building Technology (09), 56-59+98. doi:10.13905/j.cnki.dwjz.2019.09.014.

Liu Huichao. (2015). Research on Reinforcement Technology of Continuous Girder Bridge of Prestressed Concrete (Master's Thesis, Chang'an University)

Kim SangHyun,Park JongSup,Jung WooTai,Kim TaeKyun & Park HeeBeom. (2021). Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method. Applied Sciences(6). doi:10.3390/APP11062478..

Zhou Yongjun, Zhao Yang, Zhao Yu, Cao Qun & Li Zhen. (2021). Study on the impact coefficient of simple support girder bridge based on dynamic load test load efficiency. Vibration and Shock (20), 207-216. doi:10.13465/j.cnki.jvs.2021.20.026.

Wang Ziqiang., 2019. Load Test of Prestressed Concrete Continuous Box Girder Bridge. The wind of science and technology, vol. 400(32), 119., doi.10.19392/j.cnki.1671-7341.201932099

Kim SangHyun,Park JongSup,Jung WooTai,Kim TaeKyun & Park HeeBeom. (2021). Experimental Study on Strengthening Effect Analysis of a Deteriorated Bridge Using External Prestressing Method. Applied Sciences(6). doi:10.3390/APP11062478..

Wei Liu, Yanjie Xue. A Static Load Test Study for One Continuous Beam bridge[J]. Environmental and Earth Sciences Research Journal,2017,4(4).

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Published

2023-07-31

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Section

Articles

How to Cite

Experimental study on real bridge before and after simple-supporting to continuous reinforced concrete hollow slab. (2023). Stavební Obzor - Civil Engineering Journal, 32(2), 188-202. https://doi.org/10.14311/CEJ.2023.02.0015